CMakeLists.txt is needed

src/playlist/tests/header-check/CMakeLists.txt

@@ -0,0 +1,21 @@
+# CMakeLists.txt in tests/header-check
+cmake_minimum_required(VERSION 3.15)
+project(PublicHeaderCheck C)
+
+# Set this to your install prefix or build tree path
+set(PM_INCLUDE_DIR "/usr/local/include")
+
+# List your public headers here
+set(PUBLIC_HEADERS
+        "${PM_INCLUDE_DIR}/projectM-4/playlist.h"
+)
+
+# Generate dummy .c files that just include the headers
+foreach(header IN LISTS PUBLIC_HEADERS)
+    get_filename_component(header_file "${header}" NAME)
+    set(test_source "${CMAKE_BINARY_DIR}/check_${header_file}.c")
+
+    file(WRITE "${test_source}" "#include \"${header}\"\nint main(void) { return 0; }\n")
+    add_executable("check_${header_file}" "${test_source}")
+    target_include_directories("check_${header_file}" PRIVATE "${PM_INCLUDE_DIR}")
+endforeach()